LG TV Light Filter Issue, Impossible To Watch Anything On It

LG does not stand behind the product it sells in any way! I bought LG 65' TV since the day I bought it, do I regret ever going in front of the brand again? The installation was done. The next day, the light filters appeared on the screen, then they struggled a lot, eventually they changed it completely, and now the same light filtering started to increase again, the service came, screenshots were taken and presented to the brand The answer came by saying there is nothing to do, this is normal. If it was normal, why did you change the TV completely, everything is normal after the change, the TV has the same problem now, why can't you find a solution to my problem? Is LG so irresponsible to change a TV? our customer satisfaction is at the forefront where satisfaction is only victimizing